Shoe.



KPATENTED 'JUNE-16, 190s. F. A. GR'ITZ, JR.

SHOE,

APPLICATION FILED .TUNE 21,1906.

. WITN ESSES INVENTon fFnAiNK; .encnniions in? snort,

"spe'inetion gleitet' rsiatne, Patented Jamie, 190e.

. 'Application med June 21, f1,9oe. sensing. 322,778,

To all whom it imag concern.' l

De 1t known that lf, FRANK A. CRrTz, Jr., a citizen of the United States, residing at West n' Point,in the county of Clay and State of Mississippi, have invented a new and useful Imrovement in Shoes, of which the `lfollowing 1s a s ecification.

This invention relates to a shoe and epe- .cially to means for Ventilating a shoe, an

. nr'ediately means for preventing back pressure through the Ventilating tubein the act of walking.

This invention consists of the novel features of construction hereinafter fully described, pointed out in the claims and shown in the accompanying drawings, in which:

Figure 1 isa perspective view of a shoe having an upper partially cut out to show the interior, certain Ventilating tubes being' shown in dotted lines.

Fig. 2 is a longitudinal section through the insole. Fig. 3 is a vertical section through the rear portion of the upper, the heel being partially shown in section. Fig. 4 is a transverse view the sole, a portion f the vamp being shown. Fig. 5 is a detailed sectional view illustrating the construction of the ventilating tube and a valve. Fig. 6 is an inverted plan view of the portion shown in section in Fig. 5, and Fig. 7 is a-'detailed sectional view through a valve casing showing a spring pressed valve in elevation.

The shoe u per A does not differ from the usual form o upper with the exception that it is provided with a flexible tube B which extends downwardly between the upperand its inner lining andwhich at its lower end is connected to a middle tube C which is arranged within the foXing which tube passes in under the heel portion of the insole and is carried forwardly along the longitudinal center of the shoe to a point immediately in advance of the instep where it is provided with an annular enlargement C', having ahinged bottom C2, which bottom acts as a check, s

` again expelled through the casing' G when valve and is controlled by a spring C3. Beneath the bottom and middle soles D and D, respectively is formed an air chamber E and the spring F, is arranged in said chamber 1in-l beneath the ball of` the foot and said spring being arranged transversely with respect -to the shoe and adapted to hold the soles D and Dl apart when the weight of the foot is not pressed upon the forward portion off theI ofthe shoe, that is, when theA foot is round or when the weight is thrownv upon e heel. Under the toe portion of the s ce through an o ening is formed in the middle sole D and in the insole D2, 'and in this opening is fitted a flanged valve casing G, provided with a perforated top G which top is ilush with the insole D2, and the casing is provided with.

a valve seat G2, at the bottom upon which rests an upwardly opening cheek valve G, normally held to its seat by a spring G4.

The tube A before mentioned opensl inwardlyat its upper end through the up )er liningy and in the ankle portion of .the s oe said lining being more or less porous or pro-- vided with a plurality of small openings as p shown at A. An air tight seam J, is run transversely across the shoe in the rear of the valve C2.

The operation of the invention as above described is as follows: The air occupying the space around ythe ankle and upper part of the foot enters the lleXible tube A `through the openingA, and asses downwardly through ythe middle conduit C and is discharged from the forward end of the same into the chamber E and passes upwardly through the valve casing G and perforated toe G', into the toe end of the shoe. This circulation of air is automatically established in the act of walking for as the weight of the foot is thrown from the heel upon the ball of the foot the spring F is compressed and the air chamber' E iore or less diminished in size, and the air therein being prevented from passing backinto the tube C by reason of the check valve C2,'lifts the valve G3, and is forced upwardly into the shoe. When the foot is lifted and the weight is thrown back upon the heel, the spring F expands and the air chamber E is restored to its normal size, but as the check valve G3, does not permit a return passageof the air from within the shoethroughfthe valve casing Gr, a vacuum 1s partially formed in the chamber E and the valve C?, is opened and air turned into the chamber E, through the tube A and conduit C and is -foxing and passing under the heel portion of the insole and' carried forwardly along the longitudinal center of the shoe to anpoint adranged Within said chamber between the two jacent the instep, said tube being e arged at valves for preventing collapse of the chamber. its inner end, a s ring pressed valve forming a bottom for sai enlergement, a. check valve l FRANK ARCHEIWS CRITZ JR.' 5 controlllng communication betweenI the toe Witnesses):

portion of the shoe and the chamber between STACY HIBBLER,

the bottom and middle soles, and means ar- JNO. G. MILLSAPS. 

